Global Patent Index - EP 0312284 A3

EP 0312284 A3 19900425 - PROCESS FOR PREPARING SUPERCONDUCTIVE SUBSTANCES COMPRISING COPPER OXIDE

Title (en)

PROCESS FOR PREPARING SUPERCONDUCTIVE SUBSTANCES COMPRISING COPPER OXIDE

Publication

EP 0312284 A3 19900425 (EN)

Application

EP 88309472 A 19881011

Priority

JP 25644987 A 19871013

Abstract (en)

[origin: EP0312284A2] A method is disclosed for preparation of superconductive substances, and in particular, those comprising a rare earth element, barium (Ba), copper (Cu) and oxygen, having a composition represented by the general formula: LnBa2Cu3O7- delta in which Ln represents a rare earth element and delta has a value of about 0 to 0.5. The method includes forming a solution containing an organic compound of a rare earth element, an organic barium compound and an organic copper compound in an organic solvent, homogenizing the resulting solution, stripping the organic solvent from the homogenized solution by evaporation to give a precipitate and pyrolyzing the precipitate to obtain the superconductive substance. The precipitate may also be formed as fibers or films prior to pyrolysis.

IPC 1-7

H01L 39/24; C01G 3/02

IPC 8 full level

C01G 1/00 (2006.01); C01G 3/00 (2006.01); C04B 35/00 (2006.01); C04B 35/45 (2006.01); H01B 12/00 (2006.01); H01B 13/00 (2006.01); H01L 39/12 (2006.01); H01L 39/24 (2006.01)

CPC (source: EP US)

C01G 3/006 (2013.01 - EP US); H10N 60/0268 (2023.02 - EP US); H10N 60/0296 (2023.02 - EP US); Y10S 505/734 (2013.01 - EP US); Y10S 505/735 (2013.01 - EP US)

Citation (search report)

  • [XP] EP 0280292 A2 19880831 - SUMITOMO ELECTRIC INDUSTRIES [JP]
  • [X] CHEMISTRY LETTERS, no. 8, August 1987, pages 1645-1646, The Chemical Society of Japan; T. KUMAGAI et al.: "Prepatation of Superconducting YBa2Cu3O7-delta Thin Films by the Dipping-Pyrolysis Process Using Organic Acid Salts"
  • [A] PROCEEDINGS OF THE COMMISSION OF THE EUROPEAN COMMUNTY-EUROPEAN WORKSHOP ON HIGH T/SUB C/SUPERCONDUCTORS AND POTENTIAL APPLICATION, Brussels, 1st-3rd July 1987, pages 295-296; T. BESAGNI et al.: "Recent progress in the development of YBa2Cu3O7-d tapes"

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0312284 A2 19890419; EP 0312284 A3 19900425; CA 1327115 C 19940222; JP H01115857 A 19890509; US 5026684 A 19910625

DOCDB simple family (application)

EP 88309472 A 19881011; CA 576747 A 19880908; JP 25644987 A 19871013; US 33693589 A 19890412